critical
10
CWE
787 122
Advisory Published
Updated

CVE-2021-34770: Cisco IOS XE Software for Catalyst 9000 Family Wireless Controllers CAPWAP Remote Code Execution Vulnerability

First published: Thu Sep 23 2021(Updated: )

A vulnerability in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol processing of Cisco IOS XE Software for Cisco Catalyst 9000 Family Wireless Controllers could allow an unauthenticated, remote attacker to execute arbitrary code with administrative privileges or cause a denial of service (DoS) condition on an affected device. The vulnerability is due to a logic error that occurs during the validation of CAPWAP packets. An attacker could exploit this vulnerability by sending a crafted CAPWAP packet to an affected device. A successful exploit could allow the attacker to execute arbitrary code with administrative privileges or cause the affected device to crash and reload, resulting in a DoS condition.

Credit: ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
Cisco IOS XE
Cisco IOS XE=3.15.1xbs
Cisco IOS XE=3.15.2xbs
Cisco IOS XE=16.6.4s
Cisco IOS XE=16.10.1
Cisco IOS XE=16.10.1e
Cisco IOS XE=16.10.1s
Cisco IOS XE=16.11.1
Cisco IOS XE=16.11.1a
Cisco IOS XE=16.11.1b
Cisco IOS XE=16.11.1c
Cisco IOS XE=16.11.2
Cisco IOS XE=16.12.1
Cisco IOS XE=16.12.1s
Cisco IOS XE=16.12.1t
Cisco IOS XE=16.12.2s
Cisco IOS XE=16.12.2t
Cisco IOS XE=16.12.3
Cisco IOS XE=16.12.3s
Cisco IOS XE=16.12.4
Cisco IOS XE=16.12.4a
Cisco IOS XE=17.1.1
Cisco IOS XE=17.1.1s
Cisco IOS XE=17.1.1t
Cisco IOS XE=17.1.2
Cisco IOS XE=17.1.3
Cisco IOS XE=17.2.1
Cisco IOS XE=17.2.1a
Cisco IOS XE=17.3.1
Cisco Catalyst 9800
Cisco Catalyst 9800-40
Cisco Catalyst 9800-40 Wireless Controller
Cisco Catalyst 9800-80
Cisco Catalyst 9800-80 Wireless Controller
Cisco Catalyst 9800-cl
Cisco Catalyst 9800-l
Cisco Catalyst 9800-l-c
Cisco Catalyst 9800-l-f
Cisco Catalyst 9800 Embedded Wireless Controller

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2021-34770?

    The severity of CVE-2021-34770 is critical with a CVSS score of 7.2.

  • What is the affected software for CVE-2021-34770?

    The affected software for CVE-2021-34770 is Cisco IOS XE Software for Cisco Catalyst 9000 Family Wireless Controllers.

  • How does CVE-2021-34770 affect Cisco Catalyst 9800 Wireless Controllers?

    CVE-2021-34770 does not affect Cisco Catalyst 9800 Wireless Controllers.

  • How can an attacker exploit CVE-2021-34770?

    An unauthenticated, remote attacker can exploit CVE-2021-34770 to execute arbitrary code with administrative privileges or cause a denial of service.

  • Where can I find more information about CVE-2021-34770?

    More information about CVE-2021-34770 can be found at the following link: [Cisco Security Advisory](https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ewlc-capwap-rce-LYgj8Kf)

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